A new corticosteroid hormone in the sea lamprey, an eel-like fish and one of the earliest vertebrates dating back 500 million years, may shed light on the evolution of steroid hormones.
Principal investigator and lead author David Close of the University of British Columbia's Department of Zoology andcolleagues at Michigan State University identified a corticosteroid hormone called 11-deoxycortisol in the sea lamprey that plays dual roles in balancing ions and regulating stresses, similar to aldosterone and cortisol in humans.
Native to the Pacific Coast of North America and Asia, Pacific lampreys are an important ceremonial and subsistence food for Aboriginal peoples in the Columbia River basin. They are born in freshwater, swim out to the ocean as adults and return to freshwater to reproduce in similar habitats to Pacific salmon and trout. Adult lampreys can grow to approximately 75 cm long and use their sucker-like mouth to attach to other fish while in the ocean.
Mouth of the Pacific lamprey. Credit: Wydoski and Whitney, 1979
"The origin of the corticosteroid signaling pathway has remained controversial over the past several decades because the identity of the ancestral corticosteroid has been elusive," says Close. "This discovery will help us better assess environmental and other stress factors on lamprey species – and provide insight into how stress-regulating hormones evolved from the earliest of vertebrates."
The findings will published online in the Proceedings of National Academy of Sciences Early Edition.
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- Free Market Validation: Men With Hair Transplants Are Seen As Younger, More Attractive
- Kudos To "The Independent" Newspaper For Debunking Nibiru "Blood Moon" Hoax
- Your Microbiome Did Not Cause Your Weight Problem
- USDA Microbiologist Warns Bacteria In Vaping Products May Be A Health Concern
- Sudden Death In Hypertrophic Cardiomyopathy - The Exercise Didn't Do It
- A Great Blitz Game
- Zika Virus May Persist In The Vagina Days After Infection
- "Sascha - I hear you. You're very angry about some knowledge you've only recently come by. You might..."
- "Kent - thanks, glad to have helped :)...."
- "Robert- Thank you for your patience and insight on this matter. I had just heard about this apocalyptic..."
- "Michael (reader who just commented) - I hid your comment as spam for trolling. I have a no trolling..."
- "Hi Robert. Thank you for responding to my comment and the information you kindly provided. I consider..."
- Breast Cancer: Genomics May Show Where Chemo Might Not Be Needed
- Gallup Poll: Great Example of How to Bias a Social Science Study
- Another Kardashian Craze Debunked
- Fad Friday: Ditch The Body Wrap!
- Commonly Cited Stat of 10 Bacteria for Every 1 Human Cell Is Wrong
- Why The EpiPen And Other Generic Drugs Are So Expensive
- Heart failure in the elderly set to triple by 2060
- Up to 80 percent of heart failure patients denied therapy to reduce hospitalization and death
- Increased risk of death for heart failure patients with each NHS hospital admission
- Nebivolol prevents anthracycline-induced cardiotoxicity
- Traffic accidents increased by 50 percent in patients with implantable cardioverter defibrillator